Summary

Dr. John Dagianis treats glaucoma, open-angle glaucoma, and cataracts, and performs eye exams, retinal imaging, and dilated eye exams. He has practiced ophthalmology for 50 years and is affiliated with Southern New Hampshire Medical Center and Saint Joseph Hospital in Nashua, New Hampshire.

He completed his residency at Thomas Jefferson University Hospital and earned his medical degree from the University of Cincinnati College of Medicine. Dr. Dagianis speaks Portuguese and Spanish. Patients on Vitals rate Dr. Dagianis 4.5 out of 5.

Overview based on verified provider data

Quick Facts

  • accepting new patients
  • 4.5
  • 50 years of experience
  • speaks Portuguese, Spanish
  • Thomas Jefferson University Hospital
  • 1 written review
  • 1 specialty
  • 10 areas of expertise
  • 2 hospital affiliations
  • 4 office locations
  • Male

Patients’ Perspective

  • Gave an accurate diagnosis
  • Had a good bedside manner
  • Spent time with me

Office Locations

Dr. John James Dagianis has 4 locations

Novamed Surgery Center Of Nashua

5 Coliseum AveNashua, NH 03063
Mon7:00 am - 4:30 pm
Tue7:00 am - 4:30 pm
Wed7:00 am - 4:30 pm
Thu7:00 am - 4:30 pm
Fri7:00 am - 4:30 pm
SatClosed
SunClosed

Nashua Eye Associates

555 Nashua StMilford, NH 03055
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 6:30 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed

Saint Joseph Hospital

172 Kinsley StNashua, NH 03060

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Dr. John James Dagianis, MD
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Dr. John James Dagianis, MDDr. Daniel Louis Schwartz, MDDr. Kevin J Kaufman, MDDr. Tomasz Stryjewski, MD
OphthalmologyOphthalmologyOphthalmologyInternal Medicine
Accepts New Patients Accepts New Patients Accepts New Patients Accepts New Patients
4.5 
3.7 
4.3 
5 
50 Years of Experience 13 Years of Experience 43 Years of Experience 13 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks Portuguese, Spanish Speaks English Speaks English, French, Italian
Nashua , NHBrookline , MABrookline , MASalem , NH
Med School: University Of Cincinnati College Of Medicine Med School: Virginia Commonwealth University School Of Medicine Med School: Perelman School Of Medicine At University Of Pennsylvania Med School: Harvard Medical School
Current Profile
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Insurance Plans Accepted by Dr. John James Dagianis

Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.

Medical Specialties

Dr. John James Dagianis has the following specialty

Specialty Expertise

Dr. John James Dagianis has the following 10 areas of expertise

  • Blindness
  • Cataract
  • Diabetic Retinopathy
  • Eye Exam
  • Eye Pain
  • Glaucoma
  • Lasik Surgery
  • Macular Degeneration
  • Refractive Surgical Procedures
  • Vision Issues

Certifications, License, & Education

50 Years Experience

Dr. John James Dagianis holds an expired medical license in the state of New Hampshire.

Medical License

Medical Doctor with an expired medical license in the state of New Hampshire that expired in 2026.

Education & Training

Residency

Completed their residency at Thomas Jefferson University Hospital.

Medical School

Graduated from University Of Cincinnati College Of Medicine in 1976.

NPI Number

Dr. Dagianis' NPI number is 1972508026.

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Frequently Asked Questions

Where is Dr. John Dagianis's office located?
Dr. John Dagianis's office is located at 5 Coliseum Ave, Nashua, NH, 03063.
Which hospitals is Dr. John Dagianis affiliated with?
Dr. John Dagianis is affiliated with Southern New Hampshire Medical Center and Saint Joseph Hospital.
What languages does Dr. John Dagianis speak?
Dr. John Dagianis speaks Portuguese and Spanish.
Does Dr. John Dagianis accept my insurance?
You can see the insurance plans that Dr. John Dagianis accepts on their Vitals profile.
Is Dr. John Dagianis accepting new patients?
Dr. John Dagianis is accepting new patients on Vitals. View Dr. John Dagianis's profile on Vitals to make an appointment.

Data Sources

This provider profile is built using data from:

  • NPPES NPI Registry
  • State medical licensing boards
  • Healthcare system and provider network data

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